Cutter.



n. H. GRAZiER.

CUTTER.

APPLICATION FILED NOV. 25. I916.

1,228,318. Patented May 29,1917.

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nurusrn H. GRAZIER, or JOHNSTOWN, PENNSYLVANIA.

CUTTER.

Specification of Letters Patent.

Patented May 29, 1917.

Application filed November 25, 1916. Serial No. 133,433.

To all whom it may concern:

Be it known that I, DURBIN H. GRAZIER, a citizen of the United States, residing at J ohnstown, in the county of Cambria and 5 State of Pennsylvania, have invented a certain new and useful Improvement in Outters, of, which the following is a specification.

The present invention relates to cutters, and has for an object to provide a device which may be applied to shears or the like for ripping and facilitating the cutting of cloth by merely pressing the device thereagainst.

The invention further aims atthe provision of a cutting attachment including a blade which is detachable and reversible, and. which is protected from contact with surrounding objects and from contact with the hand, the blade beingprovided with an adjustable pressure ,roller which may be moved into position opposite to any part of the blade throughout its length.

The above, and other objects and advantages of this invention will be more clearly brought out in the following specific description of the present preferred embodiment, the same being illustrated in the accompanying drawing wherein:

Figure 1 is a side elevation of apair of shears, the thumb loop being on top, and the improvement of this invention being applied thereto.

Fig. 2 is a top edge View thereof showing the attachment,

Fig. 3 is an enlarged sectional view taken on the line 33 of Fig. 1, showing the detachable and adjustable blade, and the ad justable roller in contact therewith.

Fig. 4 is a detail perspective view of the combined guide and support.

Fig. 5 is a detail perspective View of the adjustable and detachable blade.

Fig." 6 is a fragmentary sectional view of in position, and the supporting means there for.

Referring to this drawing, 10 and 11 designate a pair of shear members which are crossed in the usual manner and pivotally connected at 12. The member 10 ispro vided with the thumb loop 13, and the mem- I ber 11 is provided with the finger loop 14,

the handle of the shears, showing theblade,

the thumb loop 13 being on top or above the finger loop when the scissors are held in the hand for use.

The member 10 is provided, adjacent to the thumb loop; 13, with an enlarged or thickened portion 15 which, in the present instance, is provided with a straight-inclined upper edge which rises from a point in rear of the pivot 12 and merges into the upper edge of the thumb loop 13. This enlargement, or block, 15 is provided in its inclined straight face with a longitudinally extending slot 16 into which is fitted one edge of the blade 17.

As shown to advantage in Figs. 3 and 5, the blade 17 is preferably elongated and provided with opposed longitudinal cutting edges, the intermediate portion of the blade being flat and thin and adapted to rest against the opposite walls or sides of the groove 16. As shown in Fig. 6, the groove 16 pro ects down into the upper edge of the member 10 to form a pocket v18 adapted to hold the forward or lower end of the blade 17 and prevent its accidental displacement from the groove 16. The opposite ends of the blade 17 terminate in abrupt diagonal edges which extend substantially in paralleL ism to provide inclined fiat faces 19 at the opposite ends of the blade. The provision of these inclined faces 19 formspoints at the opposite ends of the blade 17 to engage in the pocket 18, one at a time, and permit of the ad ustment of the blade to present its opposite cutting edges for operation.

Shoulders 16 are formed in one or both ends of the groove 16 to engage the opposite ends of the cutting edges of the blade 17 to support the latter and prevent injury to the cutting edge by contact against the bottom of the groove 16.

The upper end of the blade 17 is held in the groove 16 by means of a combined guard and support 20, which is substantially U- shaped in cross-section and provided at its upper end with an attaching lug 21 adjustably secured to the upper edge of the thumb loop 13. The body portion .of the guard 20 extends downwardly from the forward end of the lug 21 and is'held thereby in spaced relation from the outer fiat face of the block 15. An upturned lip 24 is formed on the lower end of the guard 20 and is adapted to yieldingly bear against the back of the adjacent blade of the shears.

The side flanges 25 of the guard 20 are provided with registering longitudinal slots 26 through which projects a pivot pin 27, the latter being headed at one end for engagement against the outer face of the adjacent flange 25, and is provided with a knurled nut 28 threaded upon its opposite end and adapted to be tightened against the opposite flange 25. A grooved roller 29 is mounted on the pivot pin 27 and is adapted to engage over the upturned cutting edge of the blade 17 and to bear against the block 15 at the opposite side of the blade. The roller projects upwardly through a longitudinally extending slot 30 formed in the back of the supporting member 20.

The lug 21 may be adjusted upon the thumb loop 13 to move the guard 20 toward and from the block 15 and thus increase or decrease the tension of the upturnedlip- 24 against the adjusting blade of the shears. This adjustment also varies the tension of the roller 29 against the block 15. As shown in Fig. 1, the roller 29 is adjusted into the lower end of the guard 20. When the shears are operated and the cloth is introduced beneath the lip 24, the cutting takes place immediately beneath the roller 29. When this portion of the blade 17 becomes dull, the roller 29 may be adjusted longitudinally in the guard 20 so as to dispose the roller opposite to a different portion of the blade 17. After this adjustment, the cutting will take place at a new point upon the blade 17 After the entire upper edge of the blade 17 has been dulled by use, the screws 22 may be removed and the guard disengaged from the shears. The blade 17 may now be turned over and reversed to seat the opposite end 19 of the blade in the socket 18, the guard 20 is placed over the block 15 and the roller 29 may be adjusted as above described with respect to the opposite cutting edge of the blade 17.

In use, it is only necessary to grasp the shears in the usual manner, the loop 13 being preferably turned upwardly and engaged by the thumb. The shears may be placed against the fabric to be cut and the upper edge of the shears engages the fabric and guides it into position beneath the upturned lip 2a, the inclined upper edge of the block 15 receiving the cloth and guiding it into contact with the blade 17. As the cloth passes upwardly beneath the guard 20, the roller 29'engages the cloth and presses it yieldingly against the blade 17 thus cutting the cloth by merely pushing the shears. The yielding action of the guard 20 is effected chiefly by the flexing of the outer end of the lug 21 so as to press the roller 29 against the block 15, and press the lip 24: against the shears. The blade 17 is preferably formed from very thin hard steel, such as is used in the construction of the usual safety razor blades.

It is readily seen that this attachment to the shears will cut practically any material from the finest to the coarsest, and the device may be readily adjusted so as to present a sharp portion of the blade 17 at all times to the material. The device may be economically manufactured as the guard 20 may be stamped from a single strip of metal, and the blades 17 are relatively thin, and the renewal of the blades may be made at a relatively small cost.

It is of course understood that various changes and modifications may be made in the details of construction in the above-specifically described shear attachment, without departing from the spirit of this inven tion, and being restricted only by the scope of the following claims.

I claim:

1. In a cutter, a support, a blade mounted on the support, a guard secured to the support in spaced relation outwardly from the blade, and a pressure member carried upon the guard and extending inwardly for contact with the blade to press material to be cut thereagainst.

2. In a cutter, the combination of a support, a blade mounted on the support, a guard having a spring projection at one end adapted to be secured to the support for holding the guard in spaced relation from the blade and having a presser foot at opposite ends adapted to engage the support beyond the adjacent end of the blade, and a pressure member mounted on the guard intermediate the ends thereof to engage material to be cut and urge the same against the blade.-

3. In a cutter, the combination of a support, a blade adapted to be secured to the upper edge of the support, a guard adjustably and resiliently mounted on the support and overhanging the blade, and a pressure member adjustably mounted in said guard and being normally urged thereby over said blade.

4. In a cutter, the combination of a support, a blade adapted to be secured to the upper edge of said support, a guard carried 6. In a device as specified, a supporting block, an elongated blade detachably mounted on the block, a guard carried by the block and overhanging the blade throughout its length, agrooved roller pivotally mounted in the guard and adapted for longitudinal adjustment therein for engagement over the blade at various points throughout its length.

7. In a device as specified, the combination of a supporting member having an upper straight inclined face, and having a groove formed in said face longitudinally thereof, a reversible double-edged blade adapted to be fitted at one edge in said groove, a guard provided at its upper edge with an attaching lug adapted for adjustable securement to said supporting member to hold the guard in spaced relation over said inclined face, said guard being provided at its lower end with an upturned guiding lip adapted to bear against the ad jacent face of the supporting member and to receive and guide cloth therebeneath for contact with the upwardly extending cutting edge of said blade, a contact roller pivotally mounted in said guard and adapted for engagement over the upwardly extending cutting edge of said blade, and means for adjusting said contact roller longitudinally in the guard for engagement over various points of said cutting edge throughout the length of said blade.

. DURBIN H. GRAZIER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

